Locomotive



J'an. 19 1926.

C. O. MIKLE LOGOMOTIVE 3 Sheets-Sheet l Filed Augusil 4, 1925 atto:"m15,

,JWM @WMM .lh nog opened.

Patented Jan. 19 1926'.

UNITED STATES CLINTON O. MIKLE, OF PORTLAND, OREGON. i

LOCOMOTIVE.

Application led August 4, 1925. Serial No. 48,048.

To all 'whom t may concern Be it known that I, CLIN'roNO. MIKLE, a

citizen of the United States of America, re-l siding at Portland, in thecounty vof Multnomah and State of Oregon, have invented certain new anduseful Improvements in Locomotives, of which the following is aspecification, reference beingL had therein to the accompanying drawing.

This invention relates to locomotives and is more particularly directedto a device for cooling the engine cylinders and which is adapted to beemployed in connection with the timing piston described and claimed inmy copending application filed December 22, 1920, Serial No. 432,548,patented Oct. 27, 1925, Patent Number 1,558,994.

An object of the invention is the pro-vision of a device which willplace the. engine cylinders of alocomotive in communication with theatmosphere when the throttle has been closed, with the engine runningand no steam in the cylinders.

Another object of the invention is the provision of a device which isautomatically operated by the closing Aof the throttle to prevent avacuum in the engine cylinders when the pistons are actuated by theprogressing locomotive and after the cylinders have been treated withsteam for a predetermined period of time to prevent carbonization of thelubricating oil.

A further object of the invention is the provision of a device foradmitting atmospheric air directly to the engine cylinders and relatedparts which are normally affected by steam under pressure duringoperation of the engine, air being admitted after a predetermined periodof time has elapsed after throttle closing, when the locomotive isdrifting and continuous admission being maintained until the throttle isA. still further object of the invention is the provision of a valvepositively actuated by a piston which controls the time for treating theengine cylinders with live steam after the throttle has been closed,said'valve controlling the admission of water under boiler pressure to acylinder for operating a piston to close or open a'valve affecting theflow of air to the engine cylinders.

This invention will be best understood from a consideration of thefollowing detailed description, in view of the accompanying drawingsforming apart of the specification; nevertheless it is to be understoodthat the invention is not confined to the disclosure, being susceptiblekof such changes and modifications which shall define no materialdeparture from the salientV features of the invention as expressed inthe appended claims.

f In the drawings:

Figure l is a longitudinal view in elevation of a locomotive shown moreor less diagrammatically with my invention applied thereto.

Figure 2 is a plan view of a timing apparatus for admitting steam to theengine cylinders with my invention applied thereto.

Figure 3 is a vertical section of the device shown in Figure 2,` takenalong the line 3-3.

Figure 4 is a fragmentary vertical section of a part of the device shownin Figure 2.

Figure 5 is a transverse vertical section `taken along the line 5-5 ofFigure 6 of a controlling valve.

Figure 6 is a longitudinal section of the controlling valveshown inFigure 5. 4

Figure 7 is a` planV view of an. hydraulic operated air valve. i Figure8 is a vertical section taken along the line 8-8 of the device shown inFigure 7.

Figure 9 is a verticaly section of the differential piston structureshown in Figure 8.

Figure 10 is a transverse section of the device shown in Figure 8Vdisclosing the connection between the air valve and the pistonstructure. l

It will be necessary to recite briefly the op eration of the timingmechanism described in my (1o-pending application referred to above andwhich controls the admission of steam to the engine cylinders to preventa too rapid cooling 'of said cylinders before the device forming thesubject matter of the present invention is -set in motionV for admittingatmospheric air to the engine cyl.- inders.

Referring more particularly to rFigures l, 2, 3 and 4, a valve 321 inpipe 32a connected i between a source of steam under pressure from theboiler is operated to admit steam simultaneously to pipes 18 and 32.When the throttle is open the steam pressure in pipes 18 and 32 willhave no etiect upon valve 25 and valve 41 since live steam from thevalve chest of the cylinder passes through pipe 18b and acts upon valve25 from the chamber 15, upon piston 22 through the bypass 13 and uponpiston 37 in the cylinder 26. Pipe 36 connects cylinders 12 and 36.Since the areas or' pistons 22 and 37 are greater than the areas or therespective valves 25 and 41 affected by steam pressure said valves willremain closed. rit this time the face 2Ob orl piston 2O in timingcylinder is acted upon by hydraulic pressure from the boiler to maintainthe piston in the position shown in Figure 3. rlhe pipe a connect-s theboiler of the engine below the minimum 10W Water level with the passage43 in the valve casing 42 and opens valve 44 against the tension oi thesprino- 46 to admit water to passage 43 and port 10 to the timingcylinder 7 and against the :face 26h of piston 20 and against piston 21.Steam also acts on the opposite tace of piston 21 from cylinder 12.

Then the throttle is closed steam is no longer admitted to pipe 18bthereby relieving pressure in chamber 15, on valve 25, and pistons 22and 37. Steam from pipe 18 toro-es valve 25 open admitting steam to pipe18", to the engine cylinders through by-pass 13 to the annular passage22i1 around piston 22 in cylinder 12, through pipe 36 to cylinder 26. Atthe instant that steam is cut off in pipe 18b and pressure is relievedagainst pistons 22 and 37, both pistons are moved in opposite directionsfrom that shown in Figures 3 and 4 by the action of steam pressurerespectively on valves 25 and 41. In these positions, piston 22 abutscylinder 11 and the attaching flange of said cylinder and is heldagainst movement by reason of the pressure against piston 23 and valve25 and piston 37 is retained by pressure on valves 40 and 41 from pipe32. lll/Then valve 41 is forced, steam is admitted to pipe 34 from thevalve casing 29 and to cylinder 7, the steam acting upon the face 2Oa ofpiston 2O to force said piston against the hydraulic pressure in saidcylinder. wWater is forced through port 10 opening the timing valve 47,thence through pipe 45il to the boiler.

The speed of piston 2O is retarded by the timing valve 47 so thatsufficient time .elapses bet-ore steam is shut otl from the enginecylinders by the closing o'f valve 25.

lVhen pistons 2O and 21, which are connected for simultaneous movementby the rod 19, are forced towards piston 22 the boss 21L on piston 21will engage piston 22 and torce said piston in an opposite directionthereby moving valve 25 on its seat and shutting ottl steam to pipe 18bwhen air is admitted to the engine cylinders, valves and steam chests bythe device forming the subject matter of the present invention.

As shown more particularly in Figure 2, the head 50 or" the cylinder 7is provided with a threaded passage into which is screwed a boss 51projecting from one end of a valve casing 52enclosing an operatingdevice for affecting the admission of air to the engine cylinders. riheboss (Figure 6) has a central passage 53 in communication with thecylinder 7 for supplying a chamber 54 with Water under boiler pressure.

A valve 55 has a stein 56 projecting through the passage 53 and adaptedto be engaged by the face 2Ob of the piston 20 when water in cylinder 7is nearly exhausted and when valve 25 is being' closed to shut oil"steam from the engine cylinders. The valve has its top and bottomfaces-'slidably mounted in grooves 57 formed in the walls or" a bushing57a received by the casing 52, the walls of said bushing beingV spacedfrom the side walls ot' the valve to provide passages 58 which connectthe passagel 53 and groove 59 with the chamber 54. VGrooves 5S) in theend of the valve adjacent the stem 56 maintain the passage 53 incommunication with passages 58 except when the valve is noved in adirection which is away from the boss 51. A spring 60 has one end in asocket 61 in the inner end of the valve and its other end in a socket ina removable plug 62 which is screwed into a threaded open end ot thecasing. A polygonally faced nut 63 ou the plug is adapted to be engagedby a suitable tool for removing or applying the plug to said casing. Thespring normally maintains the valve in the position shown in Figure 6.

r1`he valve has a chamber 64 connecting an exhaust port 65 and anadmission port 66 iormed in the valve casing 52 and bushing 57a. A port67 connects the chamber 54 with a pipe 68. The port 66 is connected witha pipe 69, while port 65 is in communication with a discharge pipe 69a.

The operating device for controlling the admission oi air is directlyconnected to a vasing 70 by the pipes 68 and 69, the casing enclosing atiming arrangement for admitting air to the engine cylinders. rElliscasing has a conduit 71 which is secured by means ot a flange to thesteam admission pipe 73 and in open communication with said pipe. steamchest 74 on the engine cylinder 75.

rlhe upper end of the casing 70 is divided by partition 76 into an airchamber 77 open to the atmosphere by a series or" perio-rations 78 inthe wall of the air chamber, and a chamber 79 which is connected below apiston 80 with the chamber 54 in the valve easing 52 by the pipe thuscausing the chamber 79 to be filled normally with water The pipe 73 isconnected to the from the boiler of the engine acting upon the innerfaces of pistons 80 and 81. The pipe 69 connects the chamber 64 in the'valve with the casing 70 above the piston 80 and below a closure 82.

Piston 81 is mounted for reciprocation in a cylinder 83`which may becast integrally with the partition 76 and has its upper open endprojecting into chamber 79 while the lower open end extends into chamber77. Piston 80 is connected to piston 81 by a rod 84. f

A rod 85 connected to piston 81 projects through the lower open endotthe cylinder 83 into air chamber 77 and is provided with a shoulder 86received by a socket 87 onthe inner face of a. valve 88. The valve isadapted to engage a seat 89 and normally7 close communication betweenthe air chamber'77 and the conduit 71 leading to the engine cylinders.

Since the valve 88 is loosely connected with rod 85 a guide 90 isprovided in the conduit 71 to receive stein 91 for aiding "i in seatingthe said valve after the same has been operated. The socket 87 has apassage 87n through which the rod 85 may be passed to remove the valve88 from the rod.

It will be noted that the conduit 71 at its outer end has a 'flangedthreaded opening at 92 into which is screwed the lower threaded openend. 93 of the casing 70.

The operation of my device is as follows:

When the piston 2() has been advanced by steam pressure on the tace 20to a position where it. forces the stein inwardly of the casing 52,valve 55 is moved longitudinally of said casing against the tension ofthe spring until shoulder 55a on the valve is placed between ports and66 closing port 66 to the atmosphere which is normally open theretothrough the connection ot chamber 64 and port 65. Port 66 is now opentothe end of the bushing 57a adjacent the passage 53 whereby boilerwater from timing cylinder 7 is forced through pipe 69 into the casingand against the upper face of piston 80. Due to the fact'that thecombined areas of the upper faces of pistons and 81 which are acted.upon by hydraulic pressure through pipes 68 and69 from the valve casing52, -is greater than the area of the lower :tace oi piston 80, piston 80is moved downwardly.

Jorcing Water from chamoer 79 into pipe 68, through valve casing 52,where itr combines with water from cylinder 7.

' As piston 81 descends valve 88 is removed from its seat 89 permittingair from chamber 77 to be drawn through conduit 71 to the enginecylinders, to prevent a vacuum formed therein and to permit thelocomotive to dritt without restraint.

When the engine throttle is again opened for operating the enginepistons, timing piston is again returned to its normal position shown inFigure 3 since steam pressure passing throughpipe 18h, pipe 13, cylinder12, pipe 36 to cylinder 26 causes piston 37 to force valve 41 on itsseat and valve 40 from its seat, thereby opening pipe 34 to theatmosphere through pipe `35. The steam in cylinder 7 which has beenacting on Jface 20- ot piston 2O escapes through pipes 34 and 35 to theatmosphere relieving pressure on piston'20.

As soon as piston 2O moves away fromstem 56 spring 60 forces the valve55 inwardly toward cylinder 7 and places chamber 64 in communicationwith ports 65 and 66. Hydraulic pressure from the boiler which throughVpassages 53 and 58, chamber 54 inthe valve casing 52 and pipe 68 actsupon the inner face ot' piston 8O causes said piston to move upwardlyforcing the water in chamber 78 through pipe 69,` portf66, 1'

rection by hydraulic pressure from the boiler, means for controlling theadmission of steam to the timing cylinder for actuating the piston inthe opposite direction when the engine throttle is closed, a valve ttorcontrolling the admission of air to the engine cylin4- `ders,'anhydraulic means associated with the Steam entering conduit 71 acts j airvalve for causing closingvand opening ot the air valve, avalve forcontrolling the hydraulic means, a resilient means Vcooperating with thetiming piston to actuate the last mentioned valve for controlling therhydraulic means to operate the air valvei 2. In a locomotive, means foradmitting steam to the engine cylinders when the throttle is closed,said means shutting ofi the steam aftera predetermined period of time,

,a valve for controlling the admission of air to the engine cylindersafter the steam has been cut oli', means toi' actuating said valve, no

means for cont-rolling the actuating means, and means cooperating withthe means 'or admitting steam to operate the controlling means.

3. In a locomotiva-means for admittingsteam to the engine cylinders whenthe throttle is closed,l said means shutting 0E the steam after apredetermined period of time, a valve for controllingl the admission ofair to the engine cylindersafter the steam has been cutjotl", means foractuating said valve,

means for controlling the actuating means, and means. cooperating withthe means for admitting steam to operate the controlling means forcausing' actuation oit the air Valve after a predetermined period ottime has elapsed after the steam has been shut oil'.

el; ln a locomotive, means tor admitting steam to the engine cylindersWhen the throttle is closed, said means shutting oil the steam alter apredetermined period oi time, a valve lor controlling the admission ofair to the agine cylinders after the steam has been cut ofi', anhydraulic means for operating the Valve, a valve for controlling thehydraulic means, and means cooperating with the means for timing theadmission ci steam to the engine cylinders 'for actuating the lastmentioned valve.

5. ln a locomotive, means for admitting steam to thc engine cylinderswhen the throttle closed, said means shutting oil the steam alter apredetermined period ot time, ayalve for controlling the admission ot'air to the engine cylinders alter the steam has been cut a pair oitdifferentially constructed pistons for operating the air valve,

lsaid pistons being actuated by hydraulic pressure from the boiler, avalve` for controlling the hydraulic pressure against the pistons, andmeans cooperating With the means for timing the admission ot steam tothel engine cylinders for controlling operation of the last mentionedValve.

6. In a locomotive, means tor admitting steam to the engine cylinderswhen the throttle is closed, said means shutting off the steam after apredetermined period of time, a Valve for controlling the admission ot'air to the engine cylinders alter the steam has been cut olf, aplurality of cylinders of different diameters, connected pistons titledlor movement in the cylinders for operating the air valve, a conduitnormally placing the cylinders in communication with the,

boiler for maintaining hydraulic pressure against both pistons inopposite directions to retain the air Valve closed, a by-pass connectingthe larger cylinders at one side of the larger piston With the conduit,a Valve interposed in the by-pass for controlling the flow of Water tothe larger cylinder to actuate the larger piston against the hydraulicpressure against bothvpistons, and means cooperating With the timingmeans for admitting steam to control the actuation of the last mentionedValve.

7. ln a locomotive, means for admitting steam to the engine cylinderswhen the throttle is closed, said means shutting oli' the steam a'tter apredetermined period of time, a valve for controlling the admission ontair to the engine cylinders after the steam has been cut off, aplurality of cylinders of dillerentdiameters, connected pis tons ttedfor movement in the cylinders cylinder, to actuate the larger pistonlagainst the hydraulic pressure against both pistons, said lastmentioned valve maintaining the ay-pass normally open to the exhaust,and means cooperating with the timing means icr admitting steam tocontrol the actuationl oi" the last mentioned valve.

8. ln a locomotive, means for admitting steam to the engine cylinderswhen the throttle is closed, said means shutting oft the steam after apredetermined periodici.

time, a valve 't'or controlling the admission olf air to the enginecylinders after the steam has been cnt oft', al plurality ofcylinders oidifferent diameters in open communie-ation with each other, a piston inthc smaller cylinder, a piston in the larger cylinder connected to thesmaller piston and separating the larger cylinder into two chambers, onechamber being in commun-ication with the smaller cylinder, a conduitnormally placing said chamber in communication with the boiler formaintaining hydraulic pressure against both pistons in oppositedirections to retain the air Valve closed, a by-pass connecting theother chambei' With the conduit, a valve interposed in the by-pass forcont-rolling the flow of Water to the second mentioned chamber toactuate the larger piston against the hydraulic pressure against bothpistons, and means cooperating with the timing means for admitting steamto control the actuation of the last mentioned valve.

9. ln a locomotive, means for admitting,`

steam to the engine cylinders When the throttle is closed, said meansshutting olil the steam alter a predetermined period of time, a valvefor controlling theradmission ot' air to the engine cylinders after thesteam i has been cut oil', means actuated by hydraulic pressure from theboiler for operating the air Valve to closed or open position, a conduitconnecting the actuating means with the boiler to normally maintain saidmeans in action to ret-ain the air Valve closed, a by-pass connectingthe actuating means With the conduit, a valve interposed in the by-passcausing Varying vof the hydraulic pressure in the actuating meanswhereby said means is operated to open the air valve, and meanscooperating With the timing means tor admitting steam to .factuate thelast mentioned valve.

lO. In a, locomotive, a timing cylinder in CTI communication with theboiler, a timing pis',- ton in the cylinder and operated in oneydirection by hydraulic pressure from the boiler, means for controllingthe admission of steam to the timing cylinder for actuating the pistoninthe opposite direction when the engine throttle is closed, a valve forcontrolling the admission of' air to the engine cylinders, meansactuated by hydraulic pressure from the timing cylinder for normallymaintaining the air valve closed, a valve provided With a stemprojecting into the timing cylinder and engaged by the piston foractuating the valve when said piston has been operated by steampressure,

said valve When operated by the piston being adapted to vary thehydraulic pressure to the actuating means for the air valve and causesaid actuating means to open the air valve. f

11. In a locomotive, a timing cylinder in communication With the boiler,a timing piston in the cylinder and operated in one direction byhydraulic pressure from the boiler, means for controlling the admissionof steam to the timing cylinder for actuating the piston in theoppositedirection when the engine throttle is closed, a valve forcontrolling the admission of air to the engine cylinder, means actuatedby the hydraulic pressure from the timing cylinder for normallymaintaining the air valve closed, a

conduit and a valve casing placing the actuating means in communicationwith the timing cylinder, a ley-pass connecting the casing with theactuating means, a valve in the casing having a stem projecting into thetiming cylinder and engaged by the piston for actuating the valve whensaid piston has been operated by steam pressure, said valve Whenoperated by the piston adapted to open the by-pass to the actuatingmeans to vary the hydraulic pressure to the actuating means for the airvalve and cause said actuating means to open the air valve.

12. In a locomotive, means for admitting steam to the engine cylinderswhen the throttle is closed, said means shutting oil:l the steam aftera'predetermined period of time, a valve for controlling the admission ofair to the engine cylinders after the steam has been shut oli', adifferential means Aadapted to be actuated rby hydraulic pressure fromthe engine boiler for causing opening or closing of the air valve, meansfor controlling the hydraulic pressure, and means cooperating with thetiming means for admitting steam for causing actuation of thecontrolling means for the hydrauli/i pressure.

13. In a locomotive, means for admitting Steam to the engine cylinderswhen f the throttle is closed, said means shutting oii the steam after apredetermined eriod of time, a valve for controlling the a mission ofair to the engine cylinders afterhthe steam has 'been shut oli', adifferential means adapted to be actuated by hydraulic pressure from theengine boiler tor causing opening or closing ot the air valve, means forcontrollingv the hydraulic pressure, and a resilient means acting inopposition to the timing means for admitting steam and cooperating withsaid means for causing actuation of the controlling means for thehydraulic pressure. f

14. In a locomotive, means oradmitting steam to the engine cylindersWhen the throttle is closed, said means shutting oif the steam after apredetermined period of time, a valve for controlling the admission ofair to the engine cylinders aiter the steam has been shut off, adifferential means adapted to be actuated'by hydraulic pressure from theengine boiler for causing opening or closing of the air valve, means forcontrolling the' hydraulic pressure, said last mentioned meanscomprising a valve casing in communication with the boiler of thelocomotive,la valve in the casing having its side yWalls spaced from thecasing to provide longitudinal passages connecting the opposite ends ofthe casing, said casing having an inlet and a discharge port, a chamberin the valve adapted to normally maintain the ports in communication,the casing being provided with a third port normally open ,i

to the longitudinal passages in the casing, a conduit connecting thelast mentioned port with the differential means to effect normally aclosure of the air valve, a by-pass connecting the `Enletport with thedifferential means, said valve in one position placing the longitudinalpassages in the casing in communication with the by-pass and thedifferential means to affect opening of the air valve.

15. In a locomotive, means for admitting steam to the engine cylinderswhen the throttle is closed, said means shutting off the steam after apredetermined period of time, a valve for controlling the admission ofair to the engine cylinders after the steam has s been shut off, adifferential means adapted to be actuated by hydraulic pressure from theengine boiler for causing opening or closing of the air valve, meanslfor controllingthe hydraulic pressure, said last mentioned meanscomprising a valvetioned port with the differential means to efof theair Valve, a stem on the valve and. posifeet normally a closure of theair valve, a tively actuated by the first means when ley-pass connectingthe inlet port With the steam is being shut oil' to move the valve and10 differential means,l said valve in one posicausing opening oi' theair valve.

5 tion placing the longtudinal passages in the In testimony whereof Ihereunto aix my easing in communication with the ley-pass signature. andthe differential means to electopening- CLINTGN O. MIKLE.

